Image sensor driving device

Abstract

The present application provides an image sensor driving device including a housing, an elastic support assembly, an image sensor assembly, a driving coil, and a magnet. The elastic support assembly includes a first circuit plate, a second circuit plate provided around the periphery of the first circuit plate and is fixed and electrically connected to the first circuit plate, and an elastic member fixed to the housing. The second circuit plate is directly opposite and spaced apart from the magnet, and the driving coil is formed on the second circuit board by material additions or etching, thereby effectively simplifying the assembly process and cost and saving the stacking space, which is conducive to the design of the magnetic circuit to enhance the BL value. Besides, the weight of the driving coil is effectively reduced, and the moving mass is about 10% lower than that of the voice coil.

What is claimed is: 
     
         1 . An image sensor drive device, comprising:
 a housing provided with an accommodating space and a through-hole connecting the accommodating space to the outside world;   an image sensor assembly accommodated within the accommodating space and directly opposite the through-hole;   an elastic support assembly fixed to an inner side of the housing and suspending the image sensor assembly within the accommodating space;   a driving coil fixed to the image sensor assembly; and   a magnet fixed to the housing and spaced opposite the driving coil; wherein the driving coil interacts with the magnet and drives the elastic support assembly in a direction perpendicular to an optical axis of the image sensor assembly to drive the image sensor assembly in synchronization;   the image sensor assembly comprises a first circuit plate, a second circuit plate provided around a periphery of the first circuit plate and fixed and electrically connected to the first circuit plate, and an image sensor body fixed to the first circuit plate;   the second circuit board is directly opposite and spaced apart from the magnet; the driving coil is formed on the second circuit board by material additions or etching, and is electrically connected to the second circuit board; the driving coil comprises a plurality of sub-coils, and each of the sub-coils comprises a plurality of coil layers stacked together; wires of the plurality of the coil layers are connected in series with each other to form a terminal electrically connected to the wires of all the coil layers, and the terminal is electrically connected to the second circuit board.   
     
     
         2 . The image sensor driving device of  claim 1 , wherein each of the coil layers comprises a copper wire layer and an insulating layer. 
     
     
         3 . The image sensor driving device of  claim 1 , wherein the second circuit board comprises a plurality of sub-circuit boards spaced apart from each other, and each of the sub-circuit boards is fixed and electrically connected to the first circuit board, and each of the sub-circuit boards is formed with the sub-coil. 
     
     
         4 . The image sensor driving device of  claim 3 , wherein the first circuit board is rectangular, and the sub-circuit boards comprise four and are located at four corners of the first circuit board, respectively; each of the sub-circuit boards comprises a first section, a second section extending from where the first section bends, and a third section formed by protrusion of a connection portion between the first section and the second section; the first section and the second section are parallel to adjacent sides of the first circuit board, respectively; both the first section and the second section are formed with the sub-coil, and the third section is fixed to the first circuit board. 
     
     
         5 . The image sensor driving device of  claim 4 , further comprising a soldering tab, wherein two adjacent sub-circuit boards form a group of circuit boards, and two of the sub-circuit boards in the same group of the circuit boards are provided with one of the soldering tabs at an end close to each other, and are both electrically connected to the soldering tabs for wiring. 
     
     
         6 . The image sensor driving device of  claim 5 , further comprising two anti-collision blocks provided opposite to each other, and two group of the circuit boards are each provided with one of the anti-collision blocks at one end close to each other, and are both fixedly connected to the anti-collision block. 
     
     
         7 . The image sensor driving device of  claim 1 , further comprising a conductive member, wherein one end of the conductive member is electrically connected to the first circuit board, and the other end of the conductive member is used for connecting an external device. 
     
     
         8 . The image sensor driving device of  claim 6 , wherein the housing comprises a bottom cover and an upper cover fixed to the bottom cover and enclosing the accommodating space together with the bottom cover; the through-hole is opened in the upper cover; the magnets comprises a first magnet fixed to the upper cover and a second magnet fixed to the bottom cover; the driving coil is sandwiched between the first magnet and the second magnet, and is spaced apart from the first magnet and the second magnet; the elastic member is fixed to the bottom cover, and the anti-collision block is fixedly connected to the top cover.